Dbsj - Test Java For Aptech

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Java Quizzes & Trivia

Working with Database and Security in Java


Questions and Answers
  • 1. 

    Driver types are used to categorize the technology used to connect to the database.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Driver types are indeed used to categorize the technology used to connect to the database. Different driver types are designed to work with specific database management systems (DBMS) and provide the necessary functionality for applications to communicate with the database. The driver type determines the method and protocol used for communication, such as ODBC (Open Database Connectivity) for a wide range of databases, JDBC (Java Database Connectivity) for Java applications, or specific drivers for popular DBMS like MySQL or Oracle. Categorizing driver types helps developers choose the appropriate driver for their specific database technology.

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  • 2. 

    This is an Application Programming Interface provided by Microsoft for access the database.It uses SQL as its database language.

    • A.

      JDBC

    • B.

      ODBC

    Correct Answer
    B. ODBC
    Explanation
    ODBC stands for Open Database Connectivity, which is an Application Programming Interface (API) provided by Microsoft. It allows developers to access different types of databases using a common set of functions. ODBC uses SQL (Structured Query Language) as its database language, which is a standard language for managing and manipulating databases. Therefore, ODBC is the correct answer as it aligns with the provided description.

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  • 3. 

    JDBC is ODBC translated into an object-oriented interface that is natural for java programmiers.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    JDBC stands for Java Database Connectivity, which is an API that provides a standard way for Java programmers to interact with databases. It allows Java applications to connect to and manipulate databases using SQL queries. ODBC, on the other hand, is a similar API that provides a standard way for applications to interact with databases, but it is not object-oriented and is primarily used in non-Java environments. Therefore, the statement that JDBC is ODBC translated into an object-oriented interface that is natural for Java programmers is true.

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  • 4. 

    In this Data processing Model,the client communicates directly to the database server without the help  of any middle-ware technologies or another server.

    • A.

      Two-tier Data processing Model

    • B.

      Three - tier Data processing Model

    Correct Answer
    A. Two-tier Data processing Model
    Explanation
    The given correct answer is "Two-tier Data processing Model". In this model, the client communicates directly with the database server without the need for any middle-ware technologies or another server. This means that the client application handles both the presentation layer and the data access layer, resulting in a simpler architecture. The client sends requests directly to the database server, which processes them and sends the response back to the client. This model is often used for smaller applications where the client and database server are located on the same machine or within a local network.

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  • 5. 

    The Type 1 driver is also known as JDBC-ODBC bridge plus ODBC driver.

    • A.

      Translates JDBC calls into ODBC calls.

    • B.

      Translates JDBC calls into database=specific calls or native calls

    • C.

      Maps JDBC calls to the underlying "network" protocol, which in turn calls native methods on the server.

    • D.

      Directly calls RDBMS from client machine.

    Correct Answer
    A. Translates JDBC calls into ODBC calls.
    Explanation
    The Type 1 driver, also known as JDBC-ODBC bridge plus ODBC driver, translates JDBC calls into ODBC calls. This means that when a Java application makes a JDBC call, the Type 1 driver converts that call into an equivalent ODBC call, which is then executed by the ODBC driver. This allows the Java application to interact with a database using the ODBC interface, which is a common interface for accessing databases in many programming languages.

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  • 6. 

    This method is use to execute any SQL statement with a "SELECT" clause, that return the result of the query as a result set.

    • A.

      ExecuteUpdate();

    • B.

      ExecuteQuery();

    • C.

      Execute();

    Correct Answer
    B. ExecuteQuery();
    Explanation
    The correct answer is executeQuery(). This method is used to execute any SQL statement with a "SELECT" clause that returns the result of the query as a result set. The executeQuery() method is specifically designed for retrieving data from a database and is commonly used when you want to retrieve and manipulate data from the database. It returns a ResultSet object that contains the data returned by the query, which can then be processed further in the application.

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  • 7. 

    This method is used to execute INSERT, DELETE, UPDATE , and other SQL DDL such as CREATE, DROP Table.

    • A.

      ExecuteUpdate();

    • B.

      Execute();

    • C.

      ExecuteQuery();

    Correct Answer
    A. ExecuteUpdate();
    Explanation
    The correct answer is "executeUpdate();". This method is used to execute SQL statements that modify the data in the database, such as INSERT, DELETE, and UPDATE statements, as well as other SQL DDL (Data Definition Language) statements like CREATE and DROP Table. It returns an integer value representing the number of rows affected by the execution of the SQL statement. It is commonly used when you want to update or modify data in the database.

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  • 8. 

    This method is used for retrieving a string value (SQL type VARCHAR) and assigning into java String object.

    • A.

      GetVarchar();

    • B.

      GetObject();

    • C.

      GetString();

    Correct Answer
    C. GetString();
    Explanation
    The getString() method is used to retrieve a string value (SQL type VARCHAR) and assign it to a Java String object. This method is commonly used when working with databases and retrieving string values from the result set. It ensures that the retrieved value is stored as a string in the Java program, allowing for further manipulation or processing.

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  • 9. 

    This method is used for retrieving the value from current row as object.

    • A.

      GetRow();

    • B.

      GetObject();

    • C.

      GetString();

    Correct Answer
    B. GetObject();
    Explanation
    The getObject() method is used to retrieve the value from the current row as an object. This means that whatever value is stored in the current row of the dataset will be returned as an object. This method is useful when you want to retrieve the value without any specific data type conversion or manipulation.

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  • 10. 

    A client application uses stored procedures increases the network traffic, but it reduces the number of times a database is accessed.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Using stored procedures in a client application does not increase network traffic. In fact, it can reduce the network traffic because the client application can send a single request to the database server, which then executes the necessary stored procedures. This eliminates the need for multiple round-trips between the client and the database server. However, using stored procedures does not necessarily reduce the number of times a database is accessed, as it depends on the specific implementation and usage of the stored procedures.

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  • 11. 

    This parameter is used to pass values into a  store procedure.The value pf this parameter cannot changed or reassigned within the module and hence is constant.

    • A.

      IN

    • B.

      OUT

    • C.

      IN/OUT

    Correct Answer
    A. IN
    Explanation
    The IN parameter is used to pass values into a store procedure. The value of this parameter cannot be changed or reassigned within the module and hence is constant.

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  • 12. 

    OUT Parameter.- 3 choices.

    • A.

      Pass out of procedure module.

    • B.

      Is a constant

    • C.

      Is a variable

    • D.

      Back to the calling block

    Correct Answer(s)
    A. Pass out of procedure module.
    C. Is a variable
    D. Back to the calling block
    Explanation
    The correct answer is "pass out of procedure module, is a variable, back to the calling block." This answer suggests that an out parameter is a variable that is passed out of a procedure module and returned back to the calling block. This implies that the value of the out parameter can be modified within the procedure and the modified value will be accessible outside of the procedure.

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  • 13. 

    This Parameter behaves like an initialized variable.

    • A.

      OUT

    • B.

      IN

    • C.

      IN/OUT

    Correct Answer
    C. IN/OUT
    Explanation
    IN/OUT is the correct answer because this parameter behaves like an initialized variable. In other words, it can be both input and output. It can be passed into a function with an initial value and then modified within the function, and the modified value can be returned or used outside the function. This allows for a more flexible and versatile use of the parameter in different contexts.

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  • 14. 

    This object does not contain the stored procedure itself but contains only a call to the stored procedure.

    • A.

      CallableStatment

    • B.

      PreparedStatment

    • C.

      PrepareCall();

    Correct Answer
    A. CallableStatment
    Explanation
    The correct answer is CallableStatment. A CallableStatement is used to call a stored procedure in a database. It does not contain the actual stored procedure itself, but rather a call to the stored procedure. This allows the application to execute the stored procedure and retrieve any output or result sets returned by the procedure.

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  • 15. 

    It reefers to the ability to move backward as well as forward through a result set.

    • A.

      Scrollable

    • B.

      Updatable

    • C.

      Holdable

    Correct Answer
    A. Scrollable
    Explanation
    Scrollable refers to the ability to move backward as well as forward through a result set. This means that the user can navigate through the data in both directions, allowing them to easily access and view different records within the result set. This feature is particularly useful when working with large datasets or when the user needs to quickly locate specific information within the result set.

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  • 16. 

    This refers to the ability to check whether the cursor stays open after a COMMIT.

    • A.

      Updatable

    • B.

      Holdable

    • C.

      Scrollable

    Correct Answer
    B. Holdable
    Explanation
    Holdable refers to the ability of a cursor to remain open after a COMMIT statement is executed. When a cursor is holdable, it allows the user to continue accessing the result set even after committing changes to the database. This is useful in situations where the user needs to perform multiple operations on the result set without having to re-execute the query. By keeping the cursor open, the user can easily navigate through the result set and perform additional operations as needed.

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  • 17. 

    The prepareStatment() method sends SQL query to the database. and this returns:

    • A.

      PrepareStatment Object

    • B.

      Callalbalestatment Object

    • C.

      PrepareCall () method.

    Correct Answer
    A. PrepareStatment Object
    Explanation
    The prepareStatement() method is used to send an SQL query to the database. This method returns a PreparedStatement object, which represents a precompiled SQL statement. This object can be used to execute the SQL statement multiple times with different values, providing better performance compared to regular Statement objects. The PreparedStatement object allows for parameterized queries, which can help prevent SQL injection attacks. Therefore, the correct answer is "PrepareStatement Object."

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  • 18. 

    The CallableStatment object contains the SQL statments.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The explanation for the given correct answer is that a CallableStatement object in Java represents a precompiled SQL statement that can be executed multiple times. It is used to call stored procedures or functions in a database. Therefore, it contains SQL statements that can be executed by the database.

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  • 19. 

    A cursor that can only be used to process from the beginning of a  ResultSet to the end of it.It is default type.

    • A.

      TYPE_SCROLL_SENSITIVE

    • B.

      TYPE_SCROLL_INSENSITIVE

    • C.

      TYPE_FORWARD_ONLY

    Correct Answer
    C. TYPE_FORWARD_ONLY
    Explanation
    The correct answer is TYPE_FORWARD_ONLY. This type of cursor can only be used to process from the beginning of a ResultSet to the end of it. It is the default type, meaning that if no specific type is specified, the ResultSet will be of type TYPE_FORWARD_ONLY.

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  • 20. 

    A Rowset Object provides scrollability and updatabilitu for any kind of DBMS or drivers.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    A Rowset Object is capable of providing both scrollability and updatability for any type of DBMS or drivers. This means that it allows for navigating through the rows of a result set in a non-sequential manner (scrollability) and also enables making changes to the data in the result set (updatability). Therefore, the statement is true.

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  • 21. 

    A ResultSet object contains a set of rows from a result set or some other source of tabular data, like a file or spreadsheet.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    A ResultSet object does not contain rows from a result set or any other source of tabular data. Instead, it represents a pointer to a specific row within a result set. It allows the programmer to navigate through the result set and retrieve the data from each row. Therefore, the correct answer is False.

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  • 22. 

    Which class is a disconnected rowset.

    • A.

      A CachedRowSet class.

    • B.

      A JDBCRowSet class.

    • C.

      A WebRowSet class.

    Correct Answer
    A. A CachedRowSet class.
    Explanation
    A CachedRowSet class is a disconnected rowset because it can operate independently from the database connection. It can retrieve data from a database, store it locally, and then disconnect from the database. This allows for offline manipulation and processing of the data without the need for a continuous connection to the database. The CachedRowSet class provides a convenient way to work with data in a disconnected manner, making it a suitable choice for scenarios where offline data manipulation is required.

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  • 23. 

    This object connects to a data source only to read data from a ResultSet or write data back to the data source.

    • A.

      A connected RowSet.

    • B.

      A Disconnected RowSet.

    Correct Answer
    B. A Disconnected RowSet.
    Explanation
    A Disconnected RowSet is the correct answer because it is an object that connects to a data source only to read data from a ResultSet or write data back to the data source. Unlike a connected RowSet, a Disconnected RowSet does not maintain a continuous connection to the data source and can be used offline, making it more efficient and flexible for data manipulation and processing.

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  • 24. 

    Which statments are true?

    • A.

      A RowSet has to be make scrollable and updatable at the time of creation.

    • B.

      Scrollability and Updatability of a RowSet is independent of the JDBC driver

    • C.

      A connect RowSet can read data from a non relational database source also.

    • D.

      A RowSet is a JavaBeans component which has to programmatically notify all registered event listener.

    Correct Answer
    B. Scrollability and Updatability of a RowSet is independent of the JDBC driver
    Explanation
    The scrollability and updatability of a RowSet is independent of the JDBC driver. This means that regardless of the specific JDBC driver being used, the ability to scroll through and update the RowSet remains consistent. The JDBC driver is responsible for establishing the connection to the database and handling the communication between the application and the database, but it does not determine the scrollability or updatability of the RowSet. These features are inherent to the RowSet itself and are not affected by the JDBC driver.

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  • 25. 

    The Result Set can not be modified and hence, It is not updatable in any way.

    • A.

      CONCURENT_READ_ONLY

    • B.

      CONCURENT_UPDATABLE

    Correct Answer
    A. CONCURENT_READ_ONLY
    Explanation
    The correct answer is CONCURENT_READ_ONLY because it states that the result set cannot be modified and is not updatable in any way. This means that any attempt to update or modify the result set will not be allowed, ensuring that the data remains unchanged during concurrent access.

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  • 26. 

    This is the mechanism of encoding information in a secret coded form, intented only for the recipient to access the information.

    • A.

      Cryptography

    • B.

      Encryption

    Correct Answer
    A. Cryptography
    Explanation
    Cryptography is the process of encoding information in a secret coded form, ensuring that only the intended recipient can access the information. It involves various techniques such as encryption, which transforms the original data into an unreadable format using algorithms and keys. Cryptography plays a crucial role in ensuring the security and confidentiality of sensitive information, especially during transmission over insecure networks.

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  • 27. 

    The term "encrypting " pertains to converting plaintext to ciphertext, which is again decrypted into usable plaintext.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The given statement is true. Encrypting refers to the process of converting plain, readable text (plaintext) into an unreadable form (ciphertext) using encryption algorithms. This is done to protect sensitive information from unauthorized access. The ciphertext can be decrypted back into the original plaintext using the appropriate decryption key. So, the statement accurately describes the process of encryption and decryption.

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  • 28. 

    This transforms the input, called the plaintext, to an output, known as ciphertext. this is known as Symmetric cryptography.

    • A.

      Hash Function

    • B.

      Secret key cryptography

    • C.

      Public Key cryptography

    Correct Answer
    B. Secret key cryptography
    Explanation
    The given explanation suggests that the process described, where the input (plaintext) is transformed into an output (ciphertext), is known as secret key cryptography. This implies that a secret key is used to encrypt and decrypt the data. Secret key cryptography, also known as symmetric cryptography, uses the same key for both encryption and decryption, ensuring that only those with the key can access the original plaintext.

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  • 29. 

    This is as asymmetric cryptography, It operates under two different keys.

    • A.

      Public Key cryptography

    • B.

      Hash Function

    • C.

      Secret key cryptography

    Correct Answer
    A. Public Key cryptography
    Explanation
    Public Key cryptography is the correct answer because it is a type of asymmetric cryptography that operates under two different keys: a public key and a private key. The public key is used for encryption, while the private key is used for decryption. This allows for secure communication and data transfer, as the public key can be freely shared with others while the private key remains secret. Public Key cryptography is widely used in various applications, such as secure email communication, digital signatures, and secure online transactions.

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  • 30. 

    This is algorithms that does not use any key, it is known as message digest.

    • A.

      Secret key cryptography

    • B.

      Public Key cryptography

    • C.

      Hash Function

    Correct Answer
    C. Hash Function
    Explanation
    A hash function is a type of algorithm that does not require the use of a key. It takes an input (message) and produces a fixed-size output called a digest or hash value. This digest is unique to each input, and even a small change in the input will result in a completely different hash value. Hash functions are commonly used in various applications, such as data integrity checks, password storage, and digital signatures. They provide a fast and efficient way to verify the integrity of data without revealing the original input.

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  • 31. 

    Which statements are true?

    • A.

      The Tamper-proofing process verifies whether the data received by the receiver is the same data as sent by the sender.

    • B.

      Spoofing or identity interception, which means impersonating the identity of a different user and use it in an unauthorized way.

    • C.

      Authentication is the process that provides tamper-proofing, while it is on the network.

    Correct Answer(s)
    A. The Tamper-proofing process verifies whether the data received by the receiver is the same data as sent by the sender.
    B. Spoofing or identity interception, which means impersonating the identity of a different user and use it in an unauthorized way.
    Explanation
    The tamper-proofing process verifies the integrity of data by ensuring that the data received by the receiver is the same as the data sent by the sender. This helps to prevent any unauthorized modifications or tampering with the data during transmission. Spoofing, on the other hand, refers to the act of impersonating the identity of a different user and using it in an unauthorized way. This can lead to security breaches and unauthorized access to sensitive information. Therefore, both statements are true and highlight the importance of tamper-proofing and the risks associated with spoofing.

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  • 32. 

    The class is use to hash value of the specified data.

    • A.

      Message Digest

    • B.

      Signature

    • C.

      KeyPair Generator

    • D.

      KeyFactory

    • E.

      Certificate Factory

    Correct Answer
    A. Message Digest
    Explanation
    The Message Digest class is used to hash the value of the specified data. Hashing is a process of converting data into a fixed-size string of characters, which is unique to the input data. This class provides various algorithms for hashing data, such as MD5, SHA-1, SHA-256, etc. The hashed value can be used for data integrity checks, password storage, digital signatures, and other security-related purposes.

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  • 33. 

    The class is used to sign and check the authenticity of digital signature

    • A.

      Message Digest

    • B.

      Signature

    • C.

      Certificate Factory

    • D.

      KeyFactory

    • E.

      KeyPair Generator

    Correct Answer
    B. Signature
    Explanation
    The Signature class is used to sign and check the authenticity of digital signatures. It provides methods to create and verify digital signatures using cryptographic algorithms. With the Signature class, a user can generate a digital signature for a message and then verify the signature to ensure the integrity and authenticity of the message. The Signature class is an essential tool for ensuring secure communication and data integrity in various applications.

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  • 34. 

    The class is used to transform opaque keys of type Key into key specifications and provide transparent representations of the underlying key material and vice versa.

    • A.

      Message Digest

    • B.

      KeyPair Generator

    • C.

      Signature

    • D.

      KeyFactory

    • E.

      Certificate Factory

    Correct Answer
    D. KeyFactory
    Explanation
    KeyFactory is the correct answer because it is a class that is used to transform opaque keys of type Key into key specifications and provide transparent representations of the underlying key material and vice versa. This means that KeyFactory allows for the conversion and manipulation of keys in a way that is compatible with different cryptographic algorithms and systems.

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  • 35. 

    The class is used to generate public key certificates.

    • A.

      Certificate Factory

    • B.

      KeyPair Generator

    • C.

      Message Digest

    • D.

      Signature

    • E.

      KeyFactory

    Correct Answer
    A. Certificate Factory
    Explanation
    Certificate Factory is the correct answer because it is a class in Java that is used to generate public key certificates. It provides methods to create X.509 certificates and Certificate Revocation Lists (CRLs) from certificate encoding formats such as DER and PEM. The Certificate Factory class is part of the Java Security API and is commonly used in applications that require certificate management and authentication.

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  • 36. 

    This class is a database of keys and certificates

    • A.

      Algorithm Parameters

    • B.

      KeyStore

    • C.

      Key

    • D.

      KeySpec

    Correct Answer
    B. KeyStore
    Explanation
    The given answer, "KeyStore," is the correct choice because a KeyStore is a class that serves as a database for storing keys and certificates. It provides methods for generating, storing, and retrieving cryptographic keys and certificates. In the context of the given information, where the class is described as a database of keys and certificates, KeyStore aligns perfectly with this description. The other options, Algorithm Parameters, Key, and KeySpec, are related to cryptographic operations but do not specifically serve as a database for storing keys and certificates.

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  • 37. 

    Cryptography is essential for making a application safe and secure, including:- 4 choices

    • A.

      Tampering

    • B.

      Non-repudiation

    • C.

      Integrity & confidentiality

    • D.

      Spoofing

    • E.

      Authentication

    Correct Answer(s)
    B. Non-repudiation
    C. Integrity & confidentiality
    E. Authentication
    Explanation
    Cryptography is crucial in ensuring the safety and security of an application. Non-repudiation ensures that a user cannot deny their actions or transactions, providing accountability. Integrity and confidentiality ensure that data remains unaltered and protected from unauthorized access. Authentication verifies the identity of users, preventing spoofing or impersonation. All of these aspects contribute to making an application safe and secure.

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  • 38. 

    This ensures that a user or a business organization or a program entity has performed a transaction.

    • A.

      Non-repudiation

    • B.

      Tampering

    • C.

      Integrity

    • D.

      Confidentiality

    Correct Answer
    A. Non-repudiation
    Explanation
    Non-repudiation refers to the ability to prove that a transaction has taken place and that the parties involved cannot deny their involvement. It ensures that once a transaction is performed, it cannot be refuted or disowned by any party. This is important for legal and auditing purposes, as it provides evidence and accountability.

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  • 39. 

    Data integrity is to protect data from getting tampered,while it is on the network.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Data integrity refers to the accuracy, consistency, and reliability of data throughout its lifecycle. It ensures that data remains intact and unaltered while it is being transmitted or stored on a network. By implementing various security measures such as encryption, checksums, and access controls, data integrity safeguards against unauthorized modifications, deletions, or corruption. Therefore, the statement "Data integrity is to protect data from getting tampered while it is on the network" is true.

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  • 40. 

    This  is a framework written in java to access and develop cryptographic functionality, and forms part of the java security API.

    • A.

      JCA

    • B.

      JCE

    Correct Answer
    A. JCA
    Explanation
    JCA stands for Java Cryptography Architecture. It is a framework written in Java that provides a set of APIs for accessing and developing cryptographic functionality. JCA forms part of the Java security API, which allows developers to implement secure communication, data integrity, and confidentiality in their Java applications. JCE, on the other hand, stands for Java Cryptography Extension, which is an additional set of cryptographic APIs that extends the functionality provided by JCA. Therefore, the correct answer is JCA.

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  • 41. 

    With this padding technique a short block is padded with a repeating byte.

    • A.

      DES

    • B.

      PKCS5

    • C.

      CBC

    Correct Answer
    B. PKCS5
    Explanation
    PKCS5 is a padding technique used in DES (Data Encryption Standard) and other cryptographic algorithms. It involves padding a short block of data with a repeating byte. This ensures that the block is extended to the required length before encryption. The use of a repeating byte simplifies the padding process and allows for easy removal of the padding during decryption. PKCS5 padding is widely used and provides a secure and efficient method for encrypting data with DES in a CBC (Cipher Block Chaining) mode.

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  • 42. 

    Single-bit ciphers are called:

    • A.

      Block cipher

    • B.

      Stream cipher

    Correct Answer
    B. Stream cipher
    Explanation
    Single-bit ciphers are called stream ciphers. Stream ciphers encrypt data one bit or one byte at a time, in a continuous stream. They are typically used for real-time communication applications, as they can encrypt and decrypt data as it is being transmitted. Stream ciphers are known for their speed and efficiency, making them suitable for applications where high-speed encryption is required. In contrast, block ciphers encrypt data in fixed-size blocks, such as 64 or 128 bits, and are commonly used for data storage and transmission where the entire block needs to be processed at once.

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  • 43. 

    Cipher objects are created using this method of the cipher class.

    • A.

      GetInstance();

    • B.

      Init();

    Correct Answer
    A. GetInstance();
    Explanation
    The getInstance() method is used to create Cipher objects in the cipher class. It is a static method that returns a new instance of the Cipher class. This method is commonly used for creating cipher objects for encryption and decryption operations in various cryptographic algorithms. The init() method, on the other hand, is used to initialize a cipher object with a specific mode, padding scheme, and key. However, in this context, the getInstance() method is the correct answer as it directly refers to the creation of Cipher objects.

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  • 44. 

    The cipher object is initialized by the init() method?

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The statement is true because in order to use a cipher object for encryption or decryption, it needs to be initialized with the init() method. This method sets up the cipher object with the necessary parameters and key to perform the cryptographic operation. Without initialization, the cipher object would not be able to function properly and perform encryption or decryption operations.

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  • 45. 

    The Code : "DES/CBC/PKCS5Padding" is the form of

    • A.

      "mode/algorithm/padding"

    • B.

      "algorithm/mode/padding"

    • C.

      "algorithm/padding/mode"

    • D.

      "DeCrypto/Cipher/padding"

    Correct Answer
    B. "algorithm/mode/padding"
    Explanation
    The given code "DES/CBC/PKCS5Padding" follows the format "algorithm/mode/padding". In this case, "DES" refers to the Data Encryption Standard algorithm, "CBC" stands for Cipher Block Chaining mode, and "PKCS5Padding" represents the padding scheme used. Therefore, the correct answer is "algorithm/mode/padding".

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  • 46. 

    "(Only)algorithm" such as

    • A.

      "DES"

    • B.

      "PKCS5"

    • C.

      "CBE"

    Correct Answer
    A. "DES"
    Explanation
    The correct answer is "DES" because it is an example of an algorithm. DES stands for Data Encryption Standard and it is a symmetric key algorithm used for encryption and decryption of data. It was developed in the 1970s and became a widely used encryption standard.

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  • 47. 

    Most these implementations mix a random number, known as the "salt" with the password text to derive an encrypted key.

    • A.

      Encryption and Decryption

    • B.

      Key Agreement

    • C.

      Password Base Encryption

    Correct Answer
    C. Password Base Encryption
    Explanation
    Password-based encryption is a method that uses a password to encrypt and decrypt data. In this method, a random number called a "salt" is mixed with the password text to derive an encrypted key. This salt adds an extra layer of security by making it harder for attackers to guess the password. By combining the salt and the password, a unique key is generated for each encryption operation, making it more difficult for unauthorized users to gain access to the encrypted data.

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  • 48. 

    Single bits or a block of bits can be encrypted into cipher blocks

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Single bits or a block of bits can be encrypted into cipher blocks. Encryption is the process of converting plaintext into ciphertext to protect the information from unauthorized access. In many encryption algorithms, such as symmetric key encryption or block ciphers, the plaintext is divided into blocks of fixed size (usually in bits) and each block is encrypted separately. Therefore, it is true that single bits or a block of bits can be encrypted into cipher blocks.

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  • 49. 

    The product components of JDBC are:

    • A.

      JDBC-ODBC Bridge.

    • B.

      Net-Protocol/all-Java driver

    • C.

      JDBC Driver Manager

    • D.

      JDBC Test Suite & JDBC API

    • E.

      ODBC

    Correct Answer(s)
    A. JDBC-ODBC Bridge.
    C. JDBC Driver Manager
    D. JDBC Test Suite & JDBC API
    Explanation
    The correct answer is JDBC-ODBC Bridge, JDBC Driver Manager, JDBC Test Suite & JDBC API. These are the product components of JDBC. The JDBC-ODBC Bridge allows Java programs to access databases through ODBC drivers. The JDBC Driver Manager is responsible for loading the appropriate driver for a specific database. The JDBC Test Suite & JDBC API provide a set of tools and interfaces for developers to interact with databases using Java. ODBC is not a product component of JDBC, but rather a separate technology for accessing databases.

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  • 50. 

    In this Environment, the java application is the client and DBMS is the database server.

    • A.

      Three-Tier JDBC

    • B.

      Two-Tier JDBC

    Correct Answer
    B. Two-Tier JDBC
    Explanation
    The given answer, "Two-Tier JDBC," suggests that the architecture being described is a two-tier model. In this model, the Java application acts as the client, directly interacting with the database server (DBMS). This means that the application is responsible for both the presentation layer and the business logic layer, while the DBMS handles the data storage and retrieval. This architecture is commonly used for smaller applications where the client and server are located on the same machine or within a local network.

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