Tag: technology

Questions Related to technology

What will be the output of the query select * from table1 order by rand()
technology databases

  1. Error

  2. All columns ordered randomly

  3. rows picked in a random way

  4. None of the above

Show answer
Correct Option: C

Is it a valid mySQL statements? SELECT @min_price:=MIN(price),@max_price:=MAX(price) FROM shop; SELECT * FROM shop WHERE price=@min_price OR price=@max_price;
technology databases

  1. True

  2. False

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Correct Option: B

What will be the output of the query SELECT column FROM table ORDER BY column DESC LIMIT 7,10;
technology databases

  1. Would skip the first 7, and then get you the next ten highest.

  2. not a valid mysql query

  3. Would skip the first 10, and then get you the next 7 highest.

  4. None of the above

Show answer
Correct Option: A

What is the full form of ISM?
technology performance

  1. Internet Service Monitor

  2. Internet Service Monitors

  3. Internet Service Monitoring

  4. Internet Services Monitoring

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Correct Option: B

Where does ISM store logs?
technology performance

  1. /opt/Netcool/var/logs

  2. /opt/Netcool/ism/datalogs

  3. /opt/Netcool/log/ism

  4. /opt/Netcool/ism/log

Show answer
Correct Option: C

ISM startup script resides in...
technology performance

  1. /opt/Netcool/bin/ism

  2. /opt/Netcool/bin

  3. /opt/Netcool/ism/scripts

  4. /opt/Netcool/ism/bin

Show answer
Correct Option: D

ISM can monitor RADIUS servers.
technology performance

  1. True

  2. False

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Correct Option: A

ISM can store logs for...
technology performance

  1. 1 day

  2. 7 days

  3. 30 days

  4. 365 days

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Correct Option: A

Given:interface Foo {}class Alpha implements Foo { }class Beta extends Alpha {} class Delta extends Beta {public static void main( String[] args) { Beta x = new Beta(); // insert code here}}Which code, inserted at line 16, will cause a java.lang.ClassCastException?

technology programming languages

  1. Alpha a = x;

  2. Foo f= (Delta)x;

  3. Foo f= (Alpha)x;

  4. Beta b = (Beta)(Alpha)x;

Show answer
Correct Option: A,B,C,D

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) Alpha a = x; - This option is incorrect because it is a valid assignment. Since Beta extends Alpha, you can assign an object of type Beta to a variable of type Alpha.

Option B) Foo f = (Delta)x; - This option is incorrect because it is a valid assignment. Since Delta extends Beta and implements Foo, you can assign an object of type Beta to a variable of type Foo by casting it to Delta.

Option C) Foo f = (Alpha)x; - This option is incorrect because it is a valid assignment. Since Beta extends Alpha and implements Foo, you can assign an object of type Beta to a variable of type Foo by casting it to Alpha.

Option D) Beta b = (Beta)(Alpha)x; - This option is incorrect because it is a valid assignment. Since Beta extends Alpha, you can assign an object of type Beta to a variable of type Beta by casting it to Alpha.

None of the given options will cause a java.lang.ClassCastException. The correct answer is None (None of the given options will cause a java.lang.ClassCastException).

Note: A java.lang.ClassCastException occurs when you try to cast an object to a type that it is not compatible with. In this case, all the assignments are valid and do not involve incompatible types, so a ClassCastException cannot occur.

Given the following directory tree, you must enable assertions for everything except for FileTwo. base |firstLevelDirectory |_Foo |_Bar | secLevelDirectory |_FileOne |_FileTwo What command-line code should you use?
technology programming languages
    1. java -ea -da:base.firstLevelDirectory.secLevelDirectory.FileTwo
    1. java -ea:base.firstLevelDirectory.secLevelDirectory.FileTwo -da
    1. java -ea:base... -da:base.firstLevelDirectory.secLevelDirectory...
    1. java -enableassertions -disableassertions:base.FileTwo
Show answer
Correct Option: A