UGC NET CS 2016 July – III

Question 1

Which of the following is a sequential circuit?

• Multiplexer

• Decoder

• Counter

• Full adder

Question 2

8085 microprocessor has _____ hardware interrupts.

• 2
• 3
• 4
• 5

Question 3

Which of the following in 8085 microprocessor performs HL = HL + DE ?

• DAD D
• DAD H
• DAD B
• DAD SP

Question 4

The register that stores all interrupt requests is:

• Interrupt mask register
• Interrupt service register
• Interrupt request register
• Status register

Question 5

The _____ addressing mode is similar to register indirect addressing mode, except that an offset is added to the contents of the register. The offset and register are specified in the instruction.

• Base indexed
• Base indexed plus displacement
• Indexed
• Displacement

Question 6

In _____ method, the word is written to the block in both the cache and main memory, in parallel.

• Write through
• Write back
• Write protected
• Direct mapping

Question 7

Which of the following statements concerning Object-Oriented databases is FALSE?

• Objects in an object-oriented database contain not only data but also methods for processing the data.
• Object-oriented databases store computational instructions in the same place as the data.
• Object-oriented databases are more adapt at handling structured (analytical) data than relational databases.
• Object-oriented databases store more types of data than relational databases and access that data faster.

Question 8

In distributed databases, location transparency allows for database users, programmers and administrators to treat the data as if it is at one location. A SQL query with location transparency needs to specify:

• Inheritances
• Fragments
• Locations
• Local formats

Question 9

Consider the relations R(A, B) and S(B, C) and the following four relational algebra queries over R and S: I. Π_{A, B} (R ⨝ S) II. R ⨝ Π_B(S) III. R ∩ (Π_A(R) × Π_B(S)) IV. Π_{A, R.B} (R × S) where R⋅B refers to the column B in table R. One can determine that:

• I, III and IV are the same query.
• II, III and IV are the same query.
• I, II and IV are the same query.
• I, II and III are the same query.

Question 10

Which of the following statements is TRUE? D₁ : The decomposition of the schema R(A, B, C) into R₁(A, B) and R₂ (A, C) is always lossless. D₂ : The decomposition of the schema R(A, B, C, D, E) having AD → B, C → DE, B → AE and AE → C, into R₁ (A, B, D) and R₂ (A, C, D, E) is lossless.

• Both D₁ and D₂
• Neither D₁ nor D₂
• Only D₁
• Only D₂