Technical Questions

Q:

What are the key challenges of software testing?

Answer

Key Challenges of s/w testing:


1. Testing considered late in project


2. Requirements not testable


3. Integration is done after all components have been developed: This might result into full testing not being covered.


4. Complete testing is not possible

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Subject: Software Testing

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Q:

 A transaction for which all committed changes are permanent is called:

A) atomic. B) consistent.
C) isolated. D) durable.
 
Answer & Explanation Answer: D) durable.

Explanation:
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Filed Under: Database

1 2980
Q:

What is thrashing?

Answer

It is a phenomenon in virtual memory schemes when the processor spends most of its time swapping pages, rather than executing instructions. This is due to an inordinate number of page faults.

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Q:

Suppose you have a computional circuit between two registers driven by a clock. What will you do if the delay of the combinational circuit is greater than your clock signal?

Answer

Use the concept of register-retiming.


divide the totla combinatorial delay in two segments such that individually the delay is less the clock period.


this can be done by inserting a flip-flop in the combinational path.


e.g.,


clock period --- 5 ns


total cominational delay ---- 7


then divide the 7ns path in two path of 4 or 3 (best resutls are obtained if delays are  same for both path i.e 3.5ns) by inserting a flip-flop in between.

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Subject: Hardware

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Q:

We Can still delete a row from primary table if there are related rows in secondary table once a refferential integrity is enforced

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

Can’t delete a row from primary table if there are related rows in secondary table.

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Subject: Database
Job Role: Database Administration

0 2974
Q:

The network layer concerns with

A) Packets B) Frames
C) Bytes D) All of the above
 
Answer & Explanation Answer: A) Packets

Explanation:

The network layer concerns with the packets. It brings the packets from the source to the destination.

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Q:

Physical data models describe the details of how data is stored in the computers

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

They describe the details of how data is stored in the computers

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Subject: Database
Job Role: Database Administration

0 2962
Q:

What are different types of DBMS?

Answer

1. DBMS


2. RDBMS (Relational)


3. ORDBMS (Object Relational)


4. DDBMS (Distributed)


5. FDBMS (Federated)


6. HDDBMS (Homogeneous)


7. HDBMS (Hierarchical)


8. NDBMS (Networked)

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Subject: Database
Job Role: Database Administration

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