ΤΕΣΤ 2 Β ΓΥΜΝΑΣΙΟΥ

Explanation
The correct answer is the memory RAM, the processor, and the graphics card. These are all components of a computer system. The memory RAM is responsible for storing data that the processor needs to access quickly. The processor is the central processing unit of the computer, responsible for executing instructions and performing calculations. The graphics card is responsible for rendering images and videos on the computer's display. All three components are essential for the proper functioning of a computer system.

Explanation
The correct answer is "ο επεξεργαστής" because it is the component responsible for executing instructions and performing calculations in a computer system. The other options listed, such as "η μνήμη RAM," "η κάρτα οθόνης," and "η μνήμη ROM," are all important components of a computer system, but they do not directly handle the processing of data and instructions like the processor does.

Explanation
The correct answer is USB because it is the most commonly used and widely supported interface for connecting devices to a computer. USB (Universal Serial Bus) allows for fast data transfer and can connect a variety of devices such as keyboards, mice, printers, and external storage devices. VGA (Video Graphics Array) is a video interface used for connecting monitors and displays, while PS2 is an older interface used for connecting keyboards and mice. Although these interfaces are still used in some cases, USB has become the standard for connecting devices to computers.

Explanation
The correct answer is μνήμη RAM, CD, σκληρό δίσκο. These options represent different types of computer hardware. μνήμη RAM refers to random access memory, which is a type of computer memory that is used to store data that is being actively used by the computer. CD refers to a compact disc, which is a type of storage medium used for storing and playing back digital data. σκληρό δίσκο refers to a hard disk drive, which is a type of storage device used for long-term data storage. These three options are all examples of different types of computer storage.

Explanation
The correct answer is "εξωτερικά στην κάρτα ήχου" because it is stating that the audio is output externally through the sound card. This means that the sound is being played through speakers or headphones connected to the sound card, rather than being played through the motherboard or network card.

Explanation
The given answer "μια μητρική κάρτα" is correct because it translates to "a motherboard" in English. A motherboard is a crucial component of a computer that connects all the other hardware components together and allows them to communicate with each other. It provides slots for inserting other cards such as a graphics card, sound card, and RAM, making it an essential part of a computer system.

Explanation
The given answer lists the processors in descending order based on their performance and capabilities. The Pentium V is likely the most advanced and powerful processor, followed by the Dual Core, Pentium III, and Celeron. This order is consistent with the historical progression of Intel's processor lineup, with each new generation typically offering improvements in speed, efficiency, and features compared to the previous ones.

Explanation
The given question is asking for the Greek word that corresponds to "ROM". The Greek word for "ROM" is "περιφορίεσ".

Explanation
The correct answer is the provision of suitable voltage of 5 and 12 volts to internal devices and the conversion of alternating current to direct current. These two functions are essential for the proper functioning of electronic devices. The provision of suitable voltage ensures that the devices receive the necessary power to operate effectively. The conversion of alternating current to direct current is necessary because most electronic devices require a steady and constant flow of current, which is provided by direct current.

Explanation
The correct answer is "μνήμη RAM" because RAM stands for Random Access Memory, which is a type of computer memory that allows data to be read from and written to quickly. It is a temporary storage space that is used by the computer to hold data and instructions that are currently being processed. ROM (Read-Only Memory) is a type of memory that stores permanent data and instructions that cannot be changed. A network card (κάρτα δικτύου) is a hardware component that allows a computer to connect to a network. A modem card (κάρτα μόντεμ) is a hardware component that allows a computer to connect to the internet through a telephone line.

Explanation
The explanation for the given correct answer is not available.

Explanation
The correct answer is "Λάθος" (Wrong). This suggests that the statement given in the question, which states that the voltage is 220 volts, is incorrect.

Explanation
The answer is "Επιλογή 1" because it is the first option listed.

Explanation
The correct answer is "Σωστό" which means "Correct" in Greek.

Explanation
The correct answer is "σε θύρα VGA." This is because VGA is a type of video output port commonly used to connect a computer or laptop to a monitor or projector. It is used to transmit analog video signals. The other options, "σε θύρα PS2" and "σε θύρα USB," are not relevant to video output and are used for other purposes such as connecting a keyboard or mouse (PS2) or various devices (USB).

Explanation
The contents of RAM memory are lost when the power goes out because RAM is a volatile type of memory. This means that it requires a constant flow of electricity to retain its data. When the power is cut off, the capacitors in the RAM modules discharge and the data stored in them is lost. In contrast, ROM memory is non-volatile, meaning it retains its data even when the power is turned off.

Explanation
The correct answer is "Επιλογη 4" because the question mentions the need for a USB port, and "Επιλογη 4" is the only option that includes the word "USB". The other options do not mention anything about a USB port, so they are not relevant to the question.