Question
Which of the following is a primary feature of Mobile
Computing?Solution
Mobile computing enables users to access computing resources while on the move, emphasizing seamless mobility and uninterrupted service during handoffs between networks (e.g., switching from Wi-Fi to cellular). This capability is vital for applications like video calls or GPS navigation, ensuring minimal disruption despite network changes. Technologies like Mobile IP, LTE, and handoff protocols manage these transitions efficiently, providing continuous connectivity. For example, in mobile applications, maintaining session continuity during network changes is critical for user experience, showcasing the robustness of mobile computing systems. Why Other Options Are Incorrect :
- Fixed-location access : This describes traditional computing, not mobile computing.
- Centralized scalability : Scalability relates to cloud or centralized systems rather than mobility.
- Data centers : Enhanced processing in data centers is unrelated to the mobility aspect of mobile computing.
- Session continuity : Mobile computing strives to maintain sessions even in low-bandwidth scenarios, contradicting the option.
In a relational database, which relationship allows multiple records in one table to be associated with multiple records in another table?
To remove all rows from a table without logging individual row deletions and without firing triggers, which command would you typically use?
A table is in 2NF (Second Normal Form) if it is in 1NF and:
Which SQL statement is used to remove all rows from a table without logging individual row deletions?
A data warehouse is primarily characterized by which of the following properties?
Which key uniquely identifies a record in a table?
Which of the following is true about ACID properties in DBMS?
Query optimization heuristic that “pushes selections down” improves:
Which of the following is used to enforce referential integrity?
Which normal form eliminates repeating groups by putting them into separate tables and connecting them through foreign keys?