Databases (GATE Computer Science): Questions 82 - 87 of 154

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Question number: 82

» Databases » Database Design

MCQ▾

Question

Which of the following is a process by which code is scrambled to hide its meaning?

Choices

Choice (4) Response

a.

Code keying

b.

Private key

c.

Code

d.

Encryption

Question number: 83

» Databases » Relational Model

MCQ▾

Question

A ________ is an attribute or combination of attributes that uniquely identifies each instance of an entity type.

Choices

Choice (4) Response

a.

Foreign key

b.

Candidate key

c.

Primary key

d.

None of the above

Question number: 84

» Databases » ER-Model

MCQ▾

Question

A key constraint that indicates that one entity can be associated with many of another entity is called________

Choices

Choice (4) Response

a.

Entity set

b.

Relationship

c.

Many-to-many relationship

d.

One-to-many relationship

Question number: 85

» Databases » Database Design

MCQ▾

Question

________ all sites has identical database management system software.

Choices

Choice (4) Response

a.

Transaction

b.

Heterogeneous distributed database

c.

Homogeneous distributed database

d.

Question does not provide sufficient data or is vague

Question number: 86

» Databases » Relational Model

MCQ▾

Question

________ are unsophisticated users who interact with the system by invoking one of the application programs that have been written previously.

Choices

Choice (4) Response

a.

Naive users

b.

Sophisticated users

c.

Specialized users

d.

None of the above

Question number: 87

» Databases » Database Design

MCQ▾

Question

There are two primary methods for generating ________

Choices

Choice (4) Response

a.

timestamps

b.

transaction

c.

unique timestamps

d.

All of the above

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