Course -Unit1

1. Files on a hard disk are stored in one or more

Memory cells

Channels

Sectors

AND gates

2. A byte consists of

1 bit

8 bits

1 word

8 word

3. 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 ________.

Value

Address

Name

Serial number

4. The operating system is a set of _______________ that interface between an application program and the hardware.

Computer chips

Sectors

System software services

Binary operation codes

5. On a mainframe computer, peripheral devices are connected to the system through a ___________ and a ____________.

Channel , I/O control unit

Interface board , buffer

Channel , interface board

Interface board, I/O control unit

6. Secondary storage consists of devices such as the hard disk and CD-ROM. Which of the following is NOT a characteristic of secondary storage?

. It is high capacity; it typically holds much more than main memory

It is non-volatile

It is intended for long term storage of files and data

The computer can execute a program directly on the secondary storage

7.

Which of the following is NOT an advantage of viewing the system as a set of layers?

It allows you to see the details and inner workings within an object

It allows a simplified view of an object

It allows you to focus on the interfaces between the layers

It simplifies the view of the system so that it can be better understood

8. A hard disk has a directory to store file information. Each directory entry contains the following information about a file:

The file's size and starting track number

The file's name and starting track number

The file's name and starting sector number

The file's size and starting sector number

9. The binary number 1011 is equivalent to which decimal number and which hex number?

12 decimal and C hex

11 decimal and C hex

12 decimal and B hex

11 decimal and B hex

10. In the processor, the Instruction Counter contains:

The data that is being manipulated

The instruction that is being executed

The address of the next data item to be fetched

The address of the next instruction to be fetched

Course -unit1