JAMB Computer Science Past Questions & Answers - Page 32

156.

Files that maintain the hierarchical structure of the file system

A.

Descriptors

B.

Directories

C.

Modifiers

D.

Relative files

Correct answer is B

Directories are the files that maintain the hierarchical structure of the file system. The users are allowed to read information in directories

157.

In general, a file is basically a collection of all related______.

A.

Rows & Columns

B.

Fields

C.

Database

D.

Records

Correct answer is D

A file is a collection of related data or program records stored on some input/output or auxiliary storage medium

158.

The rules that govern the structure of a command or programming language is called

A.

Syntax

B.

Algorithm

C.

Logic

D.

Password

Correct answer is A

Syntax refers to the rules that define the structure of a language. Syntax in computer programming means the rules that control the structure of the symbols, punctuation, and words of a programming language

159.

What is the full form of CU?

A.

Compound Unit

B.

Communication Unit

C.

Computer unit

D.

Control unit

Correct answer is D

CU stands for control unit.
The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor. A CU typically uses a binary decoder to convert coded instructions into timing and control signals that direct the operation of the other units (memory, arithmetic logic unit and input and output devices, etc.)

160.

Typically, an ATM is used for

A.

record keeping

B.

budget making

C.

watching movies

D.

withdrawing cash

Correct answer is D

An Automated Teller Machine, better known as an ATM, is a specialized computer that makes it convenient for bank account holders to manage their money. It allows them to check their account balances, withdraw or deposit money, transfer money from one account to another, print a statement of account transactions, and even purchase stamp