Course -unit1
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Self assessment Of Unit 1
- 1.The operating system is a set of _______________ that interface between an application program and the hardware.
- A.
computer chips
- B.
Sectors
- C.
System software services
- D.
Binary operation codes
- 2.Which of the following is NOT an advantage of viewing the system as a set of layers?
- A.
It allows you to see the details and inner workings within an object
- B.
It allows a simplified view of an object
- C.
It allows you to focus on the interfaces between the layers
- D.
It simplifies the view of the system so that it can be better understood
- 3.A byte consists of
- A.
1 bit
- B.
8 bits
- C.
1 word
- D.
8 word
- 4.Bytes or words are the basic addressable units of memory. In order for the processor to be able to access the byte or word, it is assigned a unique ________.
- A.
Value
- B.
Address
- C.
Name
- D.
Serial number
- 5.In the processor, the Instruction Counter contains:
- A.
The data that is being manipulated
- B.
The instruction that is being executed
- C.
The address of the next data item to be fetched
- D.
The address of the next instruction to be fetched
- 6.Files on a hard disk are stored in one or more
- A.
memory cells
- B.
Channels
- C.
Sectors
- D.
AND gates
- 7.A hard disk has a directory to store file information. Each directory entry contains the following information about a file:
- A.
The file's size and starting track number
- B.
The file's name and starting track number
- C.
The file's name and starting sector number
- D.
The file's size and starting sector number
- 8.On a mainframe computer, peripheral devices are connected to the system through a ___________ and a ____________.
- A.
Channel , I/O control unit
- B.
Interface board , buffer
- C.
Channel , interface board
- D.
Interface board, I/O control unit
- 9.The binary number 1011 is equivalent to which decimal number and which hex number?
- A.
12 decimal and C hex
- B.
11 decimal and C hex
- C.
12 decimal and B hex
- D.
11 decimal and B hex
- 10.Secondary storage consists of devices such as the hard disk and CD-ROM. Which of the following is NOT a characteristic of secondary storage?
- A.
. It is high capacity; it typically holds much more than main memory
- B.
It is non-volatile
- C.
It is intended for long term storage of files and data
- D.
The computer can execute a program directly on the secondary storage
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